View original ↗on arcaclimate.com
deal · 2025
Microsoft ↔ Arca
Microsoft: a firm purchase of 300,000 t of surficial mineralization of alkaline solid feedstocks removal from Arca.
BuyerMicrosoft
SupplierArca
Tonnes300,000 t
Capture pathwaySurficial mineralization of alkaline solid feedstocks
Storage mediummineralized
Commitment typefirm
Deal structureofftake
Source pathway descriptionIndustrial Mineralization using mine waste at active mine operations; alkaline waste streams and byproducts from heavy industries like mining and steel; CO₂ mineralized and locked away permanently
Storage descriptionCO₂ is mineralized and locked away permanently in rock for over 10,000 years
Delivery windowover the next decade
Verificationthird-party verification
NotesDescribed as 'the largest commercial agreement for Industrial Mineralization'. Page states 2025 completion of world's first carbon removal project using mine waste at active mine operation with 10x increase in mineralization rate. Specific announcement date within 2025 not provided.
Durability defaultedtrue
Previous durabilitydurable-1000y
Previous durability basispathway-default
Durability notePathway default removed; duration requires source evidence
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